/*
 * Copyright 2019 Confluent Inc.
 *
 * Licensed under the Confluent Community License (the "License"); you may not use
 * this file except in compliance with the License.  You may obtain a copy of the
 * License at
 *
 * http://www.confluent.io/confluent-community-license
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OF ANY KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations under the License.
 */

package io.confluent.ksql.test.util;

import java.util.TimeZone;
import org.junit.rules.TestRule;
import org.junit.runner.Description;
import org.junit.runners.model.Statement;

public final class TimezoneRule implements TestRule {
  private final TimeZone tz;

  public TimezoneRule(final TimeZone tz) {
    //  make a deep copy to satisfy spotbugs
    this.tz = TimeZone.getTimeZone(tz.getID());
  }

  @Override
  public Statement apply(final Statement base, final Description description) {
    return new Statement() {
      @Override
      public void evaluate() throws Throwable {
        final TimeZone defaultTimeZone = TimeZone.getDefault();
        try {
          TimeZone.setDefault(tz);
          base.evaluate();
        } finally {
          TimeZone.setDefault(defaultTimeZone);
        }
      }
    };
  }
}